Goodwill, Customer Relationships and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill, customer relationships and other intangible assets

Customer relationships and other intangible assets consisted of the following:

	As of December 31,
	2024		2023
	(Dollars in millions)
Customer relationships(1), less accumulated amortization of $4,504 and $3,896	$	3,196	3,810
Capitalized software, less accumulated amortization of $451 and $419	373		427
Total other intangible assets, net	$	3,569	4,237

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(1)For the year ended December 31, 2023, customer relationships decreased $121 million in conjunction with the sale of select CDN contracts in the fourth quarter of 2023 that resulted in a net loss of $73 million included in selling, general and administrative expenses in our consolidated statement of operations.

Schedule of goodwill

The following table shows the rollforward of goodwill from December 31, 2022 through December 31, 2023:

	(Dollars in millions)
As of December 31, 2022(1)	$	1,970
Impairment	(1,970)
As of December 31, 2023	—
As of December 31, 2024	$	—

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(1)Goodwill at December 31, 2022 is net of accumulated impairment loss of $8.2 billion.

Schedule of estimated amortization expense of intangible asset

We estimate that future total amortization expense for finite-lived intangible assets will be as follows:

	(Dollars in millions)
2025	$	654
2026	642
2027	600
2028	558
2029	368
2030 and thereafter	747
Total finite-lived intangible assets future amortization expense	$	3,569